Question: Who was the rector of Charles University in Prague whose administration ended in 1990?
Paraphrase: What was the name of the rector of Charles University in Prague whose administration ended in 1990?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q31519 p:P1075 ?s . ?s ps:P1075 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1990')) }